CRESCENT® Socket, System of Measurement: Metric, Hex Tip, 1/4 in Drive, 13 mm Socket, Standard Length, 0.88 in Overall Length, 1/2 in Opening Depth, 0.7 in Drive End Width, 0.7 in Socket End Width, 6 Points, 0.496 in Bolt Clearance, Alloy Steel, Finish: Full Polished Chrome